The issue could be the version of Outlook you are running. Thunderbird is a 32 bit version only software so that is why it works with the send pdf to email function without an issue. The 64 bit version of Outlook we have seen fail to function properly when trying to use the send pdf to email function.
So I would first check if you are running a 64 bit version of Outlook if so you will want to switch to a 32 bit version or go back to Thunderbird which will work as well.
So I would first check if you are running a 64 bit version of Outlook if so you will want to switch to a 32 bit version or go back to Thunderbird which will work as well.
I think you’re right because I’m running with Outlook 2016 64bits. I got back to Thunderbird (32bits version) and it works fine.
We have a similar problem which I suspect has the same cause.
After emailing a pdf the library is fine til it is re-openned then it opens as a read only locked volume (for some libraries) and other libraries require a full recover/repair procedure before it works again (see attchment).
When is this likely to be resolved as we cant ask IT to change outlook just for Endnote users.